Method for filling boxes with a preselected quantity of discrete articles

ABSTRACT

A METHOD FOR FILLING A BOX WITH A PRESELECTED AGGREGATE NUMBER OF ARTICLES OR A PRESELECTED AGGREGATE WEIGHT OF ARTICLES UTILIZING A VERTICAL FEED CONVEYOR HAVING A BOTTOM ARTICLE RELEASE END RECEIVED WITHIN A BOX BEING FILLED TO MINIMIZE THE DISTANCE A RELEASED ARTICLE FALLS TO THE BOTTOM OF THE BOX OR TO A LAYER OF ARTICLES ALREADY DEPOSITED IN THE BOX. THE BOX IS RAISED TO ENCLOSE THE RELEASED END OF THE VERTICAL FEED CONVEYOR AND AS EACH ARTICLE IS DEPOSITED IN THE BOX IT IS COUNTED. AT A PRESELECTED INTERMEDIATE COUNT OF ARTICLES THE BOX IS INCREMENTALLY LOWERED SELECTED VER-   TICAL INTERVAL TO PROVIDE SPACE FOR ADDITIONAL ARTICLES. IN A SECOND EXAMPLE OF THE INVENTION, THE WEIGHT OF EACH ARTICLE AS IT IS PLACED IN THE BOX IS SENSED AND UPON REACHING A PRESELECTED INTERMEDIATE WEIGHT, THE BOX IS INCREMENTALLY LOWERED A SELECTED VERTICAL INTERVAL. MEANS ARE PROVIDED FOR SHAKING THE BOX DURING THE FILLING OPERATION TO SETTLE AND CLOSELY ARRANGE THE ARTICLES IN THE BOX.

1971 K. F. RUSSELL 3,618,285

METHOD FOR FILLING BOXES WITH A PRESELECTED QUANTITY OF DISCRETE ARTICLES Original Filed July 13, 1967 5 Sheets-Sheet 1 1 INVENTO/Q Nov. 9, 197] F, RUSSELL 3,618,285

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1971 K. F. RUSSELL 3,618,

METHOD FOR FILLING BOXES WITH A PRESELECTED QUANTITY OF DISCRETE ARTICLES Original Filed July 13, 195"! 5 Sheets-Sheet 5 flrroemzas.

United States Patent US. Cl. 53-26 4 Claims ABSTRACT OF THE DISCLOSURE A method for filling a box with a preselected aggregate number of articles or a preselected aggregate weight of articles utilizing a vertical feed conveyor having a bottom article release end received within a box being filled to minimize the distance a released article falls to the bottom of the box or to a layer of articles already deposited in the box. The box is raised to enclose the release end of the vertical feed conveyor and as each article is deposited in the box it is counted. At a preselected intermediate count of articles the box is incrementally lowered a selected vertical interval to provide space for additional articles. In a second example of the invention, the weight of each article as it is placed in the box is sensed and upon reaching a preselected intermediate weight, the box is incrementally lowered a selected vertical interval. Means are provided for shaking the box during the filling operation to settle and closely arrange the articles in the box.

This is a division of application Ser. No. 653,239, filed July 13, 1967 and now Pat. No. 3,492,779.

The present invention contemplates a method for filling boxes or receptacles with discrete articles, such as fruit, in accordance with, in one example, numerical count of the fruit or, in another example, weight of the fruit. The invention contemplates a novel method for moving the box and fruit whereby a box may be rapidly filled under conditions which minimize the possibility of damage to the article as it is deposited in the box.

Prior proposed methods for filling a box of selected volume and size with fruit, which may have been already sized in accordance with Well-known sizing apparatus, have included hand packing the fruit in the box by arranging the fruit in layer patterns which were predetermined according to the size and number of fruit required to fill such a box. Such hand-packed boxes require skilled packers to rapidly arrange the fruit into the predetermined layer patterns and to maintain over many packing hours a suitable packing rate. Obviously such a method for handpacking boxes requires many packers, is time consuming, and is generally an economically inefficient method of packing boxes.

Prior proposed apparatuses for mechanically packing boxes have included machines for counting fruit as they are discharged into a box, Pat. No. 2,928,599. However, in such proposed machine, the lemons fall a substantial distance into the box; certain types of fruit are more fragile and subject to damage by such a fall.

In another proposed machine for filling boxes in which fall is minimized, a vertically disposed feed conveyor lowers articles into a box raised into box-receiving position with respect to the feed conveyor, Pat. No. 2,061,- 490. However, the box was successively lowered by scraping contact of the bottom of the conveyor with the top surface of fruit deposited therein.

In another prior construction, a bucket-type elevator was lowered into a container and then progressively raised with respect to the container as the level of the articles deposited therein increased, the raising of the loading conveyor being in response to the increase in level of the articles, Pat. No. 2,889,676. In still other prior constructions, particularly when filling a box to accordance with weight, articles were fed to the box first in bulk and then singly in order that a precise weight could be obtained.

Such prior proposed constructions, where fall was minimized, controlled the relative separation of the feed conveyor end and the box being filled by contact with the articles placed in the box. Where a feed or bucket conveyor was moved vertically, the mechanical arrangement of such construction was expensive, complex and heavy. In other constructions, movement of the box horizontally and then vertically also involved expensive complex construction.

The present invention relates to a method for precise filling of a box with articles by count, in one example, or by weight, in another example. The invention contemplates a novel, simple, efficient box conveyor construction which includes a box-transfer station to permit change in the path of travel of the box from horizontal to vertical. The present apparatus includes means to position the box with respect to a feed conveyor which is vertically disposed so that fall of individual articles into the box are minimized. Means are provided for counting each article as it is deposited in the box or weighing an intermediate quantity of such articles as they are fed to the box. Means are also provided for lowering the box at selected vertical intrevals as the box is filled to accommodate additional fruit, shaking the box to settle the articles in the box, and when a precise number of articles or weight is reached, to lower the box to the transfer station to continue horizontal path of travel of the box for closing of the box and discharge to storage.

The principal object of the present invention is to disclose and provide a method for rapidly, precisely, accurately filling a box with discrete articles.

An object of the invention is to disclose and provide such a method wherein one article is released at a time with a minimum fall to the bottom of the box being filled or to a previously deposited layer of articles in the box.

An object of the invention is to disclose and provide article feed-conveyor means, which permit the supply of articles in bulk or random fashion and then separates the articles into a selected number of channels, rows or lines arranged in such a manner that only one article at a time is released for deposit in a box.

Still another object of the invention is to disclose and provide a novel means for shaking or vibrating a box which is positioned in filling relationship with a feed conveyor and at selected intervals so that articles deposited therein may be settled and arranged in a manner which approximates the layered pattern of a hand-packed box.

A further object of the invention is to disclose and provide control means for such an apparatus which permits substantially automatic operation of the machine and which is reliable, rapid and efficient in operation.

A still further object of the invention is to disclose and provide a method for filling boxes which is capable of packaging articles which are readily subject to damage as by abrasion or bruising by contact with other articles or with walls of a box.

A still further object of the invention is to disclose and provide a novel box-conveyor construction including a box transfer station cooperable with a box-elevating means.

Other objects and advantages of this invention will be readily apparent from the following description of the drawings in which exemplary embodiments of the invention are shown.

In the drawings:

FIG. 1 is a front elevational view partly in section of an apparatus embodying this invention.

FIG. 2 is a fragmentary top plan view of the box transfer portion of the box conveyor means, the view being taken in the plane indicated by line IIII of FIG. 1.

FIG. 3 is a side elevational view of FIG. 1, partly in section, the section being taken in the planes indicated by line IIIIII of FIG. 1.

FIG. 4 is an enlarged fragmentary sectional view taken in the plane indicated by line 1VIV of FIG. 1, but with the box carriage and box in raised filling position.

FIG. 5 is a fragmentary enlarged sectional view taken in the same plane as FIG. 4 and showing the photosensing unit in detail.

FIG. 5 is an enlarged fragmentary sectional view showing the box carriage in an intermediate position and the drive for the vertical feed conveyor and holding belt means.

FIG. 7 is a vertical transverse sectional view taken in the plane indicated by line VII-VII of FIG. 4.

FIG. 8 is a schematic control circuit diagram for the apparatus shown in FIG. 1.

FIG. 9 is a view of the control panel shown in FIG. 2 schematically indicating selection of intermediate fruit count and aggregate fruit count.

FIG. 10 is a modification of the box carriage means whereby the apparatus shown in FIG. 1 may be adapted to filling boxes by weight.

An article loading or packaging apparatus embodying the present invention is generally indicated at 10, FIG. 1. In this example fruit, such as oranges, are shown; other discrete articles such as lemons, grapefruit. plums or nonproduce type articles may be packaged or boxed by this apparatus. Apparatus 10 comprises a box-conveyor means 11 provided with a box-transfer station 12 at which a vertically movable box carriage 14 may receive a box 15 for raising to a top-feed position, FIG. 3. Box-elevator means 17, FIG. 3, includes fluid-operable means 18 for moving box carriage 14 from its lower-box receiving position to its upper-box feeding position, FIG. 4. In upperfeed position, box 15 receives therewithin the lower end of a vertical article feed-conveyor means 20 which may be fed by a bulk or random article feed-conveyor means 21. Means 22 responsive to the quantity of fruit being placed in box 15, in this embodiment of the invention counts the fruit just prior to release of each fruit from the vertical feed-conveyor means 20. Control means are provided to control the vertical and bulk feed conveyors 20 and 21 in accordance with the quantitative measurement by count or by weight of fruit placed in the box and includes means for incrementally stepping the box carriage 14 downwardly until the total or aggregate amount of fruit is in the box and the box carriage 14 is then returned to its lowermost position where the continuously moving box conveyor moves the filled box from the box-transfer station. In one embodiment of the invention, each fruit is counted, the number of fruit to be placed in the box being determined by the size of the fruit. In another embodiment of the invention, fruit being placed in the box is continuously weighed and at certain weight intervals the box is lowered until a selected weight of fruit is accumulated in the box whereupon the box is lowered onto the box conveyor for removal.

In detail, apparatus 10 may comprise a base frame means 24 including suitable base frame members 25, in this example, supported upon casters 26, it being understood that the frame means 24 may be fixed or secured to a supporting surface if desired. Extending along the front and on top of the base frame means 24 may be a pair of spaced channel members 27 which may form a frame for the box-conveyor means 11.

Box-conveyor means 11 may comprise a continuously moving endless belt 28 supported at its ends by rollers 29 mounted on shafts 30 supported in journal bearings 31 carried by channel members 27. One of the shafts 30 may be driven by a suitable motor means 32 carried by the base frame means. Bottom lay 33 of the belt means 28 extends continuously between the end rollers 29. The top lay 34 is provided with a box-transfer portion 35 located immediately below the vertical feed conveyor means 20. Transfer portion 35 is defined by a pair of longitudinally spaced belt loops 36, each loop 36 being formed by longitudinally spaced rolls 37 and a lower roll 38 mounted between and below the spaced rolls 37 so as to provide a vertical downwardly disposed transverse opening 39 in the plane of the top lay 34 box-conveyor belt 28. The box-transfer portion 35 may be of less length than the length of a box to be positioned thereon so that bottom end margins 40 of a box supported by portion 35 may overlie the transverse spaces 39. Thus a box 15 moved by the box conveyor onto belt portion 35 is positioned so that its horizontal path of travel may be stopped and changed into a vertical path of travel above portion 35.

Box carriage 14 may comprise spaced U-shaped end members 41 connected by side walls 41a which flare outwardly at their upper portions 41b, such upper portions having a top edge return to hold side flaps of an open box in open position. End flaps of such a box will normally remain open or in non-interfering position. The lower transverse portions of U-shaped end members 41 are received in openings 39 below the plane of the top lay 34 to permit passage of a box thereover.

Means 17 for raising and lowering box carriage 14 and a box 15 thereon may comprise an upstanding planar frame 42 including suitable upright and horizontal frame members. At its bottom end, frame 42 may be pivotally connected at 43 to a forwardly extending plate 44 secured as by welding to a base frame member 25 and to a vertical frame member 45. At its top end, frame 42 is connected by a pivotally mounted link 46 to vibrating m r means 47 as hereafter described.

Frame 42 carries intermediate its length upper and lower pairs of parallelogram arms 49 and 50 respectively pivotally mounted to frame 42 and pivoted at 51 and 52 respectively to members 41 of the box carriage 14. Carried by an upper transverse frame member on the upright frame 42 may be a forwardly extending bracket 53 to which is pivotally mounted at 54 a double-acting fluid cylinder means 55 which has a piston rod 56 pivoted at 57 to an arm 58 fixed to pivot shaft 59 which connects one end of the pair of arms 49 to frame 42. Doubleacting cylinder means 55 may be connected by fluid conduits 60 to a fluid-pump means 61 driven by a motor means 62. Thus upon selective actuation of the fluid cyl' inder means 55, as later described, the box carriage 14 will be lifted vertically by the parallelogram arms 49 and 50 until the open box receives therein the lower end of the vertical feed conveyor 20.

It should be noted that the top of frame 42 is connected by pivoted arm 46 to an eccentric 64 carried by a shaft 65 mounted in suitable bearings 66 on vertical frame members 45, said shaft carrying a pulley wheel 67 connected by a belt 68 to a motor pulley 69 driven by vibrating-motor means 70. Eccentric arm 46 will be reciprocated generally in a horizontal direction to cause rapid forward and backward movement of frame 42 about its bottom pivotal mounting at 43 for imparting a shaking or vibratory force to carriage 14 and to fruit placed in box 15 to settle, compact, and arrange fruit in layers. The carriage 14 is vibrated at selected intervals during loading as will be described hereinafter. In this example, the respective locations of the pivot 43, arms 49 and 50, and arm 46 imparts horizontal and vertical vibratory force components to the articles.

Means for feeding fruit to the box generally comprises the vertical feed conveyor and the horizontal feed conveyor 21 which supplies fruit to the vertical conveyor. Feed conveyor 21, FIG. 2, may be supported in elevated horizontal position above base frame means 24 by vertical frame members 45, upwardly rearwardly inclined frame members 80, top horizontal frame members 81 and a suitable arrangement of vertical and horizontal frame elements 82 and 83 located between the tops of members 45 and the horizontal frame members 81. The feed conveyor 21 may comprise an endless belt '85 having a top lay moving across a supporting plate 86. The forward or delivery end of top lay 85 may be supported by a roller 87 of relatively small diameter so that the delivery end can be closely positioned to the path of travel of the vertical feed conveyor 20. The bottom lay 88 of the endless belt may be supported by a roller 89 mounted on horizontal frame members 81, and may then pass downwardly and partially around a drive roll 90 and then vertically upward. A roller 91 then supports the bottom lay from the frame member 81 and tensions the belt against the drive roll. The bottom lay may pass around an end roller 92 of relatively large diameter. Fruit may be fed to the back end of the feed belt 85 by any suitable means. The fruit may be fed at random and are contained on the top lay of the belt between the side walls 93 of the frame members 81. The fruit fed at random is advanced toward the delivery end of the feed conveyor 21 and at the delivery end such random massed fruit is separated into rows or lines of fruit by guide rails 94 which form part of the vertical feed conveyor 20.

Vertical feed-conveyor means 20 may comprise an endless conveyor belt 96 of the same width as belt 85 and is provided with a plurality of longitudinally spaced cleats or fruit support elements 97 projecting at right angles from the outer face of the belt 96. The cleats 97 in adjacent row are longitudinally offset to form an echelon arrangement as best shown in FIG. 7. Such offsetting of cleats in adjacent rows permits the delivery at the bottom end of conveyor means 20 of only one fruit at a time since the cleat of the adjacent row will be still supporting a fruit at the time of release of the first mentioned fruit from its supporting cleat as the belt 96 turns about the bottom of the conveyor 20.

Belt 96 is supported about a top relatively large diameter roll 98 carried by a shaft 98a supported at its ends by a tubular U-shaped frame 99 which extends beneath roll 98. At its opposite end the belt 96 is supported by a relatively small diameter roll 100 so as to provide a relatively small or narrow feed-conveyor nose capable of entering the open top of a box and extending into the box into selected distance from the bottom of the box. Thus, as cleat '97 turns around the bottom roller 100, a fruit carried by such a cleat will roll off the cleat and fall only a short distance to the bottom of the box or to a layer of fruit in the box.

Means for guiding fruit from the feed conveyor 21 onto the vertical conveyor 20 may comprise the guide rails 94 which may be supported at their upper ends by a horizontal rod 102 supported from the top of frame members 81. Guide rails '94 extend rearwardly over the delivery end of feed belt 85 and then sharply turn into parallel relationship with the belt 85 to extend over the top roll 98 of the vertical conveyor 20 and thence downwardly in a vertical direction to a point opposite the narrow bottom roll 100 and then turn partially around roll 100 at the bottom of the feed conveyor. Thus guard rails 94 together with close positioning of the top of the conveyor 20 with the delivery end of conveyor 21 permits fruit to be fed by feed belt 85 to the delivery end where each fruit will fall into line with the rows of cleats on feed conveyor 20. As fruit are discharged from the delivery end of the feed conveyor, each fruit will fall onto a cleat 97 and be carried by such cleat over the top of roll 98 and then fall upon the cleat forwardly thereof.

Thus fruit is held by cleats 97 between rails 94 at the top and vertical sections of conveyor 20.

Means for holding and preventing fruit from rolling forwardly off a cleat 97 may comprise an endless-holding belt 104 supported at its top by a roller 105 carried on a shaft 106 mounted at opposite ends on the forward depending end portions 107a of arms 107. Shaft 106 supports side members 108 which carry at their bottom a pivotally mounted roll 109 for supporting the lower end of belt 104. The holding belt 104 is also adjustably supported with respect to the forward lay of the cleated belt 96 by a pair of springs 111 connected to side members 108 for biasing the holding belt toward the vertical lay of the cleated belt 96. Thus the inner lay 112 of belt 104 may be closely positioned into parallel relationship with the cleated belt 96 so that the inner surface of the inner lay 112 may contact and hold, if necessary, fruit carried by cleats 97. It is desirable that each fruit be not only prevented from falling forward and off cleat 97 as it travels downwardly on conveyor 20 but also that it be properly positioned with respect to an opening 142 in cleated belt 96 to assist in counting the fruit being dropped into the box as later described.

Each fruit supported by a cleat 97 as it travels downwardly toward the box is held virtually stationary on the cleat by the inner lay 112 of the belt 104. Belt 104 is driven in correlation with the driving of the vertical feed conveyor 20 so that the linear speed of the adjacent lays 112 of belt 104 and the vertical front lay of belt 96 will move at virtually the same linear speeds.

Means for adjusting the vertical relationship of the top of conveyor 20 with the delivery end of conveyor 21 may comprise a vertical post 116 slidable and zfixed in a clamp means 117 secured to the forward end of one of the frame members 81. The lower end of post 116 may be welded to a sleeve 118, FIG. 1, carrying shaft 98a.

Means for driving the feed conveyors 21 and 20 and its associated holding conveyor 104 may comprise a motor means supported on top of top frame members 81. Motor means 125 drives through a suitable gear means 126 a sprocket 127 which drives a chain 128 engaged at its lower end by a sprocket 1 29 carried by a transverse shaft 130. Shaft 130 supports a sprocket 131 which is engaged by a drive chain 132 which engages at its other end a sprocket 133 carried by shaft 134 for driving the feed belt 85 of the feed conveyor 21.

From shaft 130 may be supported a sprocket of approximately the same diameter as sprocket 129 which drives a forwardly extending drive chain 136 which engages sprocket 137 carried on shaft 98a of the top roll of the vertical feed conveyor 20. Sprocket 137 drives shaft 98a and internal sprocket 138 which is engaged by chain 138a extends forwardly and upwardly to drive a small diameter sprocket 139 which meshes with a sprocket 140 carried at the top end of the holding-belt means 104. The selection of sprocket sizes correlates the linear movement of the feed belts 85, vertical elevator belt 96 and holding belt 104 so that fruit advanced along the feed conveyor 21 will move at a substantially uniform rate from the belt 85 to the belt 96 and be held without relative movement between the belts by the inner lay 112 of belt 104.

Means 22 for counting each fruit just before it falls from the vertical feed conveyor 20 into the box may comprise windows or openings 142 in belt 96 between C adjacent cleats 97 and centrally between adjacent rails 94,

each opening 142 being of generally vertically elongated rectangular shape to afford suflicient belt material between cleats 97 to prevent a fruit from falling rearwardly through the opening, Adjacent bottom roller 100 of the vertical feed conveyor 20 are transversely arranged a plurality of photo or light-responsive means 143, each of said means being aligned with a vertical row of windows 142. Each photo-responsive means 143 may comprise a light source 144 directing a light beam through window 142 towards the surface of a fruit carried by a cleat 97. Each light-responsive unit also includes a beam receptor 145 aligned with the window and light beam to receive the beam when it is reflected from the surface of the fruit as the fruit passes by the beam. Thus as belt 96 travels in a downward path to deposit a fruit into the box, each window 142 admits the beam from the light source 143 and the presence of a fruit is indicated by reflection of the beam into the light receptor 145. In the event no fruit is being carried by a cleat 97, then the light beam from the light source 143 is not reflected and the light receptor receives no indication of a fruit being present. Preferably belt 96 has a smooth non-reflecting black surface facing light-responsive means 143.

The light receptors 145 of each light-responsive unit 143 are connected to an electrical counting device (not shown) of well-known make which includes a control panel 146 (FIGS. 2, 9), for selection of intermediate or subcount of articles and also selection of the total count or aggregate number of articles desired to be deposited in a box. In this example, control switches for indicating intermediate or subcount of articles are indicated generally at section 150 and may include a row of toggle switches 151 each placed below a numerical indicia indicating count, as for example, 2,2,4,8,16,32 in one row and therebeneath 1,0,0,0,0,0. The count is progressively arranged so that, for example as indicated with the position of toggle switches 151 the intermediate article count would be 16, that is 2+2+4+ 8. The set of toggle switches for preselecting total or aggregate count is indicated in the section 152, the toggle switches being in a row 153. In this example, the numerical count indicia is extended up to 128 so that combinations of 2,2,4,8,l6,32,64,128, and 1, may be made to preselect a desired quantity of fruit. Thus, for example, if 88 oranges were to be placed in a box, the intermediate set 150 may be set to count at 25 by turning up toggle switches beneath 16,18 and turning toggle switch down towards 1. The 25 count would be three times for a subcount total of 75. As each intermediate or subcount was reached, the box would be lowered an incremental amount as hereafter described. After reaching the aggregate count of 88 set on section 152, the box would be lowered to the box-transfer station. The distance that the box carriage travels downwardly in response to the present intermediate count is determined by a time delay which will be described hereinafter in connection with the operation of the device.

In operation of the apparatus shown in FIGS. 1 through 9, inclusive and referring first to FIG. 1, box may be fed to box conveyor 11 from a supply or feed conveyor 160 having a continuously moving belt 161 which moves at a slower speed than belt 34 of the box conveyor 11. Conveyor 160 is aligned with box conveyor 11 and is closely adjacent thereto as shown in FIG. 1. When box carriage 14 is in lowermost position, the cross member of U-shaped carriage members 41 may depress a box-stop leved 163 pivoted at 164 to the frame and having an uptured opposite box stop end 165 located between ends of the infeed portion of conveyor means 11. Lever 163 is normally biased upwardly by a spring 166 located between stop end 165 and the pressure contact of member 41.

When box carriage 14 is in lowermost position, a box 15 thereon which has been filled will be transported by the box-conveyor belt 34 from the box-transfer station 12. Since box-stop level 163 is depressed, a second box will be advanced to belt 34 of conveyor 11 and as that box contacts belt 34, it will be advanced rapidly to the box-transfer station because of the difference in speed of the belts 161 and 34. When a second box is advanced onto box-transfer portion 12, it will contact a switch means 170 carried at the proximate end of the box-transfer by the channel members 27 of the box conveyor. Switch 170 has a normally open and a normally closed pair of contacts 170a and 1701) respectively.

FIG. 8. When contacts a are closedy by a box 15, a relay 171 having normally open contacts 171a and 171b are closed and when switch 170 is released by clearance of a box, actuate a relay 172 with normally open contacts 172a for operating a four-way solenoidactuated Valve 174 with a time delay 175 having normally closed contacts 175a a cause fluid in the conduits 60 to actuate the hydraulic-cylinder means 55 to raise box carriage 14 through the parallelogram arms 49 and 50. The carriage is timed to raise just as the box is completely in the box station 12 (when switch 170 is released by the passing box), the carriage lifting the box off moving belt-transfer portion 35. As soon as the carriage 14 releases pressure contact with box-stop lever 163, the upturned stop end 165 will be interposed in the path of the next succeeding box 15 on belt 161 so that a succeeding box will not be advanced by more rapidly moving belt 34 to the box-transfer station 12. Time delay 175 serves as a safety device to deactuate the solenoid valve 174 in case of jamming by a box or the like.

The fluid-cylinder means 55 raises the box carriage 14 to an uppermost box-filling position determined by contact of arm 49 with switch means 177 supported from a vertical member of side frame 42, FIG. 4. Switch means 177 has normally closed contacts 177a and normally open contacts 177l). When contacts 177a are opened by arm 49, the circuit controlling valve 174 is deenergized and lifting of carriage 14 is stopped. When normally open contacts 177b are closed, relay 178 having normally open contacts 178a is energized to actuate the magnetic starter 179 to start the feed-conveyor motor 125. This feed-conveyor motor circuit may be provided with an overload 180 which is normally closed. Thus, when the box carriage reaches its uppermost position as determined by switch means 177 and fluid-cylinder means 55, the feed conveyors 20 and 21 are simultaneously energized through the above-described drive means and fruit fed to the feed conveyor 21 will be advanced toward the vertical feed conveyor 20 as previously described.

As the fruit are channeled into rows, are picked up by the cleats 97 on the belt 96, and are lowered in a vertical path with fruit in adjacent paths being vertically offiset, each fruit with its correlated window 142 in belt 96 will pass the photoelectric sensing unit 22. The beam from each light source 143 which is directed toward the fruit and which will pass through the window opening 142 will be reflected by a fruit carried by cleat 97 and returned to a light receptor 144. Light receptor 144 transmits a signal to the electrical counting device 199 in the control panel where as previously described an intermediate or subcount of fruit and a total aggregate count of fruit have been selected depending upon the size of the fruit and quantity of the fruit desired to be deposited in the box.

As each fruit passes a light beam from light source 143, it is counted and then deposited on the bottom of the box. When the selected subcount is reached, the electrical counting device 199 through it contacts 199a energizes a counter relay 1 81 having normally open contacts 181a and a relay 182 having normally open relay contacts 182a, 18212 and 182a for actuation of a time delay 183 having normally closed contacts 183a. Time delay 183 determines the vertical distance through which the carriage is lowered at the end of each predetermined subcount of articles fed to the box. Time delay 183 may be adjusted for any selected time period. Upon closing of the open contacts of relay 182b, solenoidacuating valve 174 of the hydraulic pump will cause hydraulic-cylinder means 55 to move the box carriage downwardly a preselected distance as determined by the time relay 183. During such stepped downward movement of the box carriage 14 feeding of fruit to the box and counting of the fruit is continued.

When relay 182 has its contacts closed, it will also energize motor-vibrating means 70 to move frame 42 rapidly reciprocally forwardly and backwardly to cause shaking of the box carriage 14 and the box 15 carried thereby. The vibrating-motor circuit may be provided with a normally closed contact 185a, time delay 185 determining the length of time that the box carriage is subject to vibration. The motor-vibrating circuit may be provided with a normally open toggle switch 186. If desired, the box and box carriage may not be vibrated during filling or lowering of the box and the period of vibration may be varied depending upon the type of articles being packaged.

After the box has been successively moved downwardly in stepped fashion in accordance with a selected number of intermediate or subcount of articles, ultimately the total count of articles as selected on the control panel is reached. Normally open relay contacts 190 of the total count counter relay are closed to energize time delay 191 which serves to keep the vertical feed-conveyor belt in operation until the last fruit counted is discharged. When the time delay contacts 191a, which are normally open, are closed at the end of the time delay cycle, the solenoid-actuated valve 174 is actuated to move the box carriage downwardly by actuation of the cylinder means 55. At the same time normally closed contacts 19111 are opened, and the feed conveyors 20 and 21 stop. When the box carriage 14 reaches its lowermost position in the box-transfer station, paralleogram arm 50 contacts a switch means 192 carried on the frame 42. Switch means 192 is normally closed and upon opening, the hydraulic pump is deactivated, downward movement is stopped, and the circuit is ready for the next cycle which is started by the succeeding box 15 which has started toward the box-transfer station 12 because stop lever 163 is down.

As soon as the filled box is in its lowermost position as provided by the down position of carriage 14, the bottom of the box is engaged by box-transfer conveyor portion 35 and is immediately advanced from the box-transfer station onto the adjacent discharge portion of the box conveyor where the box may be closed and it may be transported to storage.

In the schematic diagram shown in FIG. 8, it will be apparent that the several motors may be connected with a suitable power source through a circuit breaker 195 and that the feed-conveyor motor 125 may be provided with a suitable brake 196 in order to promptly stop the feed conveyors so that additional fruit are not released from the bottom of the feed conveyor to provide an overcount of fruit. The control circuit described above may be fed from the main power source through a suitable transformer 197 with a suitable circuit breaker 198. The electrical counting device is indicated in circuit diagram at 199 and is schematically connected to the light receptor photocell 144 as shown. The carton-conveyor motor 32 may be provided with circuit having normally closed overload 200 and a normally closed overload 201 connected with the hydraulic motor means 62.

Operation of the above-described apparatus and method of filling a box with discrete articles has been illustrated with a vertical feed conveyor having four channels or lanes to feed articles to the discharge or release end of the vertical feed conveyor. Where fruit may be of a smaller size than that intended for packaging with the four-channel feed belt, it will be readily apparent that the feed belt together with its arrangement of guide rails may be readily removed fom the vertical feed conveyor frame and replaced with a feed belt having five, six, seven or eight channels or lanes for feeding smaller sized fruit. The construction of such a multi-channeled feed belt may be the same as that described above and corresponding number of light-responsive means would be mounted in the vertical feed belt frame in place of the four responsive means shown in the present embodiment. Thus by simply changing the belt of the vertical feed conveyor and the lightresponsive means, it will be apparent that apparatus may be readily modified for packaging articles of different size.

Vibrating means for the box carriage and box may permit vibration thereof during a box-filling operation, during lowering of a box carriage, or during both filling and lowering operations simultaneously. Certain sized fruit may be preferred to be vibrated in the box only during vertical movement of the box as it is incrementally stepped downwardly in accordance with the number of fruit deposited in the box. In such instances, the combination of downward movement and horizontally and vertically directed shaking force components imparts movement to articles being deposited which causes them to quickly closely arrange themselves in a layer pattern,

Means to steady and hold the box 15 against relative movement with respect to carriage 14 durin the filling operation and during vibration of the box may comprise a biased spring arm or plate 210 carried by the carriage and extending through opening 211 in side wall 41a for spring pressure engagement against the opposed wall of the box so as to press the box against the outer wall 41a of the carriage. Spring plate 210 is mounted so that in lowermost position of carriage 14 the spring plate is retracted in opening 211 so that passage of a box onto the carriage will not be interfered with. As the carriage is initially raised, the spring plate is caused to move through the opening 211 and into pressure engagement with the box. As the box is returned to its lowermost position after filling, the spring plate is again retracted through the opening 211. It will thus be apparent that movement of the box relative to the carriage 14 during a filling operation is restrained and the box is frictionally held in the carriage.

The width of the vertical feed-conveyor belt 36 may be only slightly less than the longitudinal dimension of the box placed upon the box-transfer station. Thus when fruit are deposited in the box by accommodation of the release end of the feed conveyor therein, each fruit is deposited substantially in a transverse zone in which it will be ultimately located, and thus movement of the fruit into such final location is minimized. Such placement of fruit in the box by the vertical feed conveyor also tends to facilitate more rapid formation of the layer pattern of fruit in the box.

Apparatus 10 may be readily adapted to fill a box with discrete fruit in accordance with weight by modifying the box-carriage means and the means responsive to quantitative measuremnt of the articles so that weight instead of count is made the unit of measure. When describing this embodiment parts similar to like parts in the prior embodiment will be given the same reference numeral plus two hundred (200).

Box carriage 214 may be lowered and raised from a box-transfer station 212 by parallelogram arms 249' and 250 in a manner similar to that described in the prior embodiment. The box-conveyor means 211 includes channel section frame members 227 provided with transverse rolls arranged as in the prior embodiment so that a belttransfer portion 235 will be provided at the box-transfer station 212.

Each U-shaped end member 241 of the box carriage may carry a pair of transversely spaced pressure-sensing units 222 of strain gage or electrical resistant type. As shown in FIG. 10, each pressure-sensing unit 222 may contact and support a corner of a box 215 when raised above the transfer station. The top face of each pressuresensing unit 222 is located below the plane of the top lay portions of the box-conveyor belt so that a box 215 will readily pass thereover.

When the box carriage is raised, it will be apparent that the box 215 is supported by four pressure sensing units 222 from the box carriage 214. Each of the four pressure-sensing units 222 may be electrically connected to an electronic weight unit which may be substituted for the counter 199 of the prior embodiment and which is responsive to signals from the pressure-sensing units 222 in accordance with the sensing of the weight of each article deposited in the box. Such an electronic weight unit is of well-known manufacture and may be programmed in a manner similar to that described for the electric counter. Thus, on a control panel, a selected sub or intermediate weight may be preset so that as articles are fed into the box and as the subweights are attained, the box will be lowered in response to such subweight total in the same manner as that described in the prior embodiment. When the aggregate total weight is attained as preselected on the control panel, the box carriage will be caused to move downwardly to the box-transfer station and a box filled with articles to a preselected weight will be discharged by the continuously running box conveyor 212.

It will be understood that other types of pressure-sensing units may be employed and may be carried by box carriage 214. In some instances it may be desirable to use two pressure-sensing units, one carried by the transverse portion of each U-shaped end member.

When apparatus is modified as above described to measure weight of articles deposited in the box, it will be apparent that the apparatus and box-filling method of this invention becomes readily adaptable for filling boxes to a predetermined weight with articles or material capable of being fed individually to the box.

In the above-described embodiments of the present invention, a box may be rapidly filled with articles by count of the articles or by actual weight of the articles. Thus, the articles are quantitively measured as they are deposited in the box and the present invention discloses a means for such quantitive measuring of the articles at approximately the moment of placement or deposit in the box. Means for moving apart the box carriage and the article release end of the vertical feed conveyor in response to such quantitive measuring means is provided at an arbitrarily preselected quantitive measurement by either count or by weight of said articles. Precise, accurate, rapid filling of a box with a selected number of articles or a selected aggregate weight of articles is therefore readily accomplished.

It will be understood that various modifications and changes may be made in the above-identified apparatus and method which come within the spirit of this invention. It will be understood that the term articles may include fruit or produce of different type and kind capable of being handled in bulk and discretely for packaging, and that the articles may be relatively large as for example grapefruit or may be relatively small as for example plums, nuts or other types of discrete articles which are of non-produce type. All such modifications and changes coming within the scope of the appended claims are embraced thereby.

I claim:

1. In a method for filling boxes with a predetermined, precise, quantitative measure of articles, including the steps of:

arranging articles in discrete separated relationship;

moving said discrete articles to a release position withing and adjacent to the bottom of a box;

counting each article at said release position;

releasing each said articles;

moving said box away from said release position at preselected subcount of said articles and for a preselected distance; and

stopping said movement of said discrete articles to said release position at a selected total count and moving said box away from said release position.

2. In a method for filling boxes with a predetermined, precise, quantitative measure of articles, including the stops of:

arranging articles in discrete spaced relationship;

moving said discrete articles to a release position within and adjacent to the bottom of a box;

releasing each said articles;

sensing the weight of each article upon deposit in said box;

moving said box away from said release position at a preselected weight subtotal and for a preselected distance; and

stopping movement of said discrete articles to release position at a selected total weight and moving said box away from said release position.

3. In a method for filling boxes with a predetermined, precise, quantitative measure of articles, the steps of:

feeding individual articles to a box at stepped box locations, first spaced from the bottom of the box, and then successively spaced from deposited layers of articles in said box;

depositing each of said articles in said box to form with other articles layers of articles;

quantitatively measuring the deposit of each article in said box; and

moving said box in accordance with preselected, subtotal, quantitative measurements and a total measurement.

4. In a method as stated in claim 3 including the step of:

vibrating said box in accordance with a preselected,

subtotal, quantitative measurement.

References Cited UNITED STATES PATENTS 2,713,446 7/1955 Vaughan 53-59 2,812,137 11/1957 Curtis et a1. 5359 X 2,953,881 9/1960 Ellison 5359 X 3,200,559 8/1965 Curtis 53-59 X THERON E. CONDON, Primary Examiner R. L. SPRUILL, Assistant Examiner US. Cl. X.R. 53-35 UNITED- STATESWPATENT OFFICE IE R TIFICATE 0 @QRRECTIONE Patent No. 3,618,285 Dated January 20, 1972 Inventor Kenneth F. Russell It is certified that error appears in the aboveidentified patent and that said Letters Patent is hereby corrected as shown below:

2 line 4, "to" should be .-.in-- 3 II 18, "5" H I I" 6 6 51, insert "an-P between "and" and. I

t "internal" 7 37; "18" should be --s-- l r 7 57, "leved" should be --lever- 7 58, "uptured" should be --upturned- H .7 73, insert --station between "transfer arid b 8, l, "close y" should be --closed-- 8, .7, "a" should be --tot 12, 14, "stops" should be "steps- EDWARDN.FLEITCII'ER,JR. 1 ROBERT GOTTSQHALK \ttesting Officer Commissioner of Patents 'f 3, "ing" should be --in- 

